No, he'd still be the greatest of all time in my book.
Specifically if he loses to Werdum, who is a top 10 HW and the reigning Abu Dabi OW champ. It wouldn't represent as bad of a loss as say, the unranked Serra beating the absolute shit out of Georges, or the unranked Chonan overcoming 9 inches of reach to highlight reel Anderson. Or, for that matter, lesnar not knowing enough about MMA to put away a clearly dazed [and unranked] Frank Mir and getting tapped out as a result.
It's one night in MMA, where anything can happen. Penn just lost a shitty decision to Edgar, anyone who doesn't still have Penn as the #1 LW in the world doesn't know a goddamn thing about rankings.
Originally Posted by DonFrye
Fedor has 1 loss, albeit a stoppage due to a cut.
I know you know this, but I'm pointing it out for noobjack, that it was a cut from an illegal elbow. It should have been a DQ in Fedor's favor.